Improvement/add three phase definitions

[maslyankov]

Priority Load and Grid Balance Sensor Definitions Update

Description

This PR updates the sensor definitions for Priority Load and Grid Balance settings in the three-phase inverter models. The changes improve the register usage by properly implementing all available bits as per the documentation.

Changes

• Updated register 141 to use all available bits (Related issue: Asymmetric Phase Feeding Definition kellerza/sunsynk#376):
  • Bits 0-1: Priority Load mode (Battery First/Load First)
  • Bits 2-3: Passive Grid Balance (Disabled/Enabled)
  • Bits 4-5: Active Grid Balance (Disabled/Enabled)
• Each setting uses its own bitmask to operate independently
• Maintains backward compatibility with existing Priority Load functionality
• Uses consistent bit patterns (10 for first option, 11 for second option)
• This PR also fixes wrong definition of Battery Wakeup setting
  • As per Wrong "ON" value for "Solar Export" kellerza/sunsynk#381 (comment)
• Initial sensors for Gen (Generator) monitoring, soon for control and config

Technical Details

• Each setting uses SelectRWSensor with appropriate bitmasks
• Bitmask values:
  • Priority Load: 0b11 << 0
  • Passive Grid Balance: 0b11 << 2
  • Active Grid Balance: 0b11 << 4
• All settings share register 141 but operate on different bits

Documentation

The implementation follows the inverter documentation which specifies:

• Bits 0-1: Priority mode selection
• Bits 2-3: Passive grid-connected power balance
• Bits 4-5: Active grid-connection power balance

This update provides better control over grid balance features while maintaining existing functionality.